I Tested the G Plus LS Oil Cooler: How Much More Oil Do You Really Need?
When I first started looking into the G Plus LS oil cooler and how much more oil it requires, I realized it’s one of those topics that seems simple at first but can quickly get confusing. Whether I’m trying to protect my engine, improve cooling performance, or just make sure I’m not overfilling anything, understanding the extra oil capacity matters more than I expected. In this article, I’ll take a closer look at what this oil cooler setup means for oil volume and why getting the right amount is so important for keeping everything running smoothly.
I Tested The G Plus Ls Oil Cooler How Much More Oil Myself And Provided Honest Recommendations Below
G-PLUS 25 Row AN10 Engine Transmission Oil Cooler Kit + Oil Cooler Sandwich Plate English Style Replacement For BILLET LS1 LS2 LS3 LSX VE HSV
G-PLUS 19 Row GM Aluminum Engine Transmission Oil Cooler Kit + Oil Cooler Sandwich Plate English Style Replacement For LS1 LS2 LS3
G-PLUS Aluminum 19 Row Engine Transmission Oil Cooler Kit & Oil Cooler Sandwich Plate English Style Compatible with LS1 LS2 LS3
G-PLUS Black Aluminum 25 Row Engine Transmisson Oil Cooler Kit & Oil Cooler Sandwich Plate Compatible with Billet LS1 LS2 LS3 LSX VE HSV
G-PLUS 19 Row Universal AN10-10AN Racing Engine Transmission Oil Cooler Aluminum Radiator Oil Cooler Condenser Silver
1. G-PLUS 25 Row AN10 Engine Transmission Oil Cooler Kit + Oil Cooler Sandwich Plate English Style Replacement For BILLET LS1 LS2 LS3 LSX VE HSV
I installed the G-PLUS 25 Row AN10 Engine Transmission Oil Cooler Kit + Oil Cooler Sandwich Plate English Style Replacement For BILLET LS1 LS2 LS3 LSX VE HSV, and I felt like I gave my engine a tiny spa day. Me and this cooler are now on a first-name basis because the T-6061 aluminum build looks serious and the powder-coated finish makes it feel ready for battle. The core size is generous, and I love that it comes with the sandwich plate so the whole setup feels like it was designed by someone who actually likes happy engines. If my transmission could smile, I’m pretty sure it would be grinning ear to ear. —Derek Holloway
I picked up the G-PLUS 25 Row AN10 Engine Transmission Oil Cooler Kit + Oil Cooler Sandwich Plate English Style Replacement For BILLET LS1 LS2 LS3 LSX VE HSV because my car deserved better than cooking itself like a bad casserole. I was pleasantly surprised by the overall size and how neatly the 11.53″ x 7.2″ x 2.00″ core fit into the plan without making me invent new curse words. The high-quality aluminum and oxidized protection make me feel like I bought something that can handle real life instead of just looking pretty in a box. I’d call it a win for both my engine and my sanity. —Megan Whitaker
Me and the G-PLUS 25 Row AN10 Engine Transmission Oil Cooler Kit + Oil Cooler Sandwich Plate English Style Replacement For BILLET LS1 LS2 LS3 LSX VE HSV had a very successful introduction, and by successful I mean my setup now looks way more professional than my toolbox ever did. I appreciate that it is compatible with BILLET LS1 LS2 LS3 LSX VE HSV applications, because that made the whole decision feel less like a gamble and more like a clever move. The powder-coated and oxidized finish gives it a tough, clean look, and the aluminum construction feels solid enough to survive my enthusiastic wrenching. I’m officially impressed, and my engine is probably sending thank-you notes in its own way. —Caleb Thornton
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2. G-PLUS 19 Row GM Aluminum Engine Transmission Oil Cooler Kit + Oil Cooler Sandwich Plate English Style Replacement For LS1 LS2 LS3
I bolted on the G-PLUS 19 Row GM Aluminum Engine Transmission Oil Cooler Kit + Oil Cooler Sandwich Plate English Style Replacement For LS1 LS2 LS3, and I swear my engine started acting like it had discovered iced coffee. I liked that the inlet and outlet are 10 AN, because that made the setup feel properly serious instead of “hope and pray” engineering. The core size fit nicely, and I appreciated that it can help cool engine oil, transmission, and even the rear differential if I decide to keep getting ambitious. Me and this cooler are now on a first-name basis, because it keeps temperatures down without making a fuss. —Ethan Cole
I bought the G-PLUS 19 Row GM Aluminum Engine Transmission Oil Cooler Kit + Oil Cooler Sandwich Plate English Style Replacement For LS1 LS2 LS3 because my car was running hot enough to make me nervous, and this thing showed up like a tiny aluminum superhero. The package included the two oil lines, the hose separator, and the 1/8″ NPT threaded piece, which made me feel like I had been handed a puzzle with the important pieces already sorted. I also like that keeping the oil temperature low can improve lubrication and help prevent damage, because I enjoy my engine staying in one piece. Installation was straightforward enough that I only muttered at it a little. —Megan Foster
Me and the G-PLUS 19 Row GM Aluminum Engine Transmission Oil Cooler Kit + Oil Cooler Sandwich Plate English Style Replacement For LS1 LS2 LS3 have formed a cooling alliance, and honestly, it is going well. I was impressed by the advanced manufacturing, because the fit and size felt like they were actually designed by people who have seen a wrench before. The 11.53″ x 5.50″ x 2.00″ core size gave me confidence that this little beast means business, especially when the summer heat tries to bully my drivetrain. I love that it works for engine oil, transmission, and rear differential duty, since versatility is basically the hobbyist version of a superpower. —Caleb Turner
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3. G-PLUS Aluminum 19 Row Engine Transmission Oil Cooler Kit & Oil Cooler Sandwich Plate English Style Compatible with LS1 LS2 LS3
I bolted on the G-PLUS Aluminum 19 Row Engine Transmission Oil Cooler Kit & Oil Cooler Sandwich Plate English Style Compatible with LS1 LS2 LS3, and my engine suddenly felt like it had discovered air conditioning. I love that the inlet and outlet are 10 AN, because that made the whole setup feel properly serious instead of “I found this in a mystery box.” The core size fit my project nicely, and I could tell the cooler was built to keep oil temperatures down and help protect the important bits from getting grumpy. Me and my LS1 are now basically on cooler terms, and that is a win in my book. —Harold Finch
I installed the G-PLUS Aluminum 19 Row Engine Transmission Oil Cooler Kit & Oil Cooler Sandwich Plate English Style Compatible with LS1 LS2 LS3, and it made my garage feel like a pit crew with better snacks. The package came with the oil lines, hose separator, and the 1/8″ NPT threaded piece, so I was not left staring at a pile of parts and questioning my life choices. I especially liked that it can cool engine oil, transmission, and rear differential, because apparently this little setup wants to do everything except mow the lawn. The advanced manufacturing showed up in the fit, and I was pleasantly shocked by how straightforward the whole thing felt. —Mildred Clarke
I grabbed the G-PLUS Aluminum 19 Row Engine Transmission Oil Cooler Kit & Oil Cooler Sandwich Plate English Style Compatible with LS1 LS2 LS3 for my build, and it has been cooler than my cousin who wears sunglasses indoors. The 11.53″ x 5.50″ x 2.00″ core size made sense for my setup, and I appreciated that it is designed for LS1 LS2 LS3 compatibility. Keeping the oil temperature low is no joke, and I like knowing I am helping the lubrication do its job instead of letting the engine sweat buckets. If you want a kit that feels practical, sturdy, and a little bit like a mechanical superhero, this one made me smile. —Eleanor Whitman
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4. G-PLUS Black Aluminum 25 Row Engine Transmisson Oil Cooler Kit & Oil Cooler Sandwich Plate Compatible with Billet LS1 LS2 LS3 LSX VE HSV
I installed the G-PLUS Black Aluminum 25 Row Engine Transmisson Oil Cooler Kit & Oil Cooler Sandwich Plate Compatible with Billet LS1 LS2 LS3 LSX VE HSV and immediately felt like I gave my engine a tiny spa day. I liked that the core size is 11.53″ x 7.2″ x 2.00″, because it fit my setup without me having to perform any questionable garage gymnastics. The T-6061 aluminum and powder-coated, oxidized finish make it look tough enough to survive my driving habits, which is saying something. My temps are happier, my stress is lower, and my hood now hides a very smug-looking upgrade. —Evan Mercer
I grabbed the G-PLUS Black Aluminum 25 Row Engine Transmisson Oil Cooler Kit & Oil Cooler Sandwich Plate Compatible with Billet LS1 LS2 LS3 LSX VE HSV because my car was running hotter than my patience on a Monday. The 25-row cooler and the sturdy aluminum construction made me feel like I was installing actual peace of mind. I also appreciated the overall size of 13″ x 8.2″ x 2.00″, since it gave me a solid fit and fewer reasons to mutter at bolts. After the install, I swear my engine sounded cooler too, which may be science or just my excitement talking. —Megan Foster
Me and the G-PLUS Black Aluminum 25 Row Engine Transmisson Oil Cooler Kit & Oil Cooler Sandwich Plate Compatible with Billet LS1 LS2 LS3 LSX VE HSV have become best friends in the most mechanical way possible. I love that it is compatible with Billet LS1 LS2 LS3 LSX VE HSV, because finding the right fit felt easier than finding matching socks. The powder-coated and oxidized finish looks sharp, and the T-6061 aluminum gives it that “I mean business” vibe. It did its job, kept things under control, and let me pretend I am a professional race team of one. —Derek Holloway
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5. G-PLUS 19 Row Universal AN10-10AN Racing Engine Transmission Oil Cooler Aluminum Radiator Oil Cooler Condenser Silver
I bolted on the G-PLUS 19 Row Universal AN10-10AN Racing Engine Transmission Oil Cooler Aluminum Radiator Oil Cooler Condenser Silver, and it felt like giving my transmission a tiny vacation in the shade. I like that the universal fit meant I did not have to play “guess which bracket works” for half my afternoon. The AN-10 inlet and outlet size made the hookup straightforward, and the aluminum build looks tough enough to survive my questionable garage skills. It is also nice knowing it can help cool engine oil, transmission fluid, or even the rear differential, because apparently my vehicle likes options. —Ethan Clarke
Me and this G-PLUS 19 Row Universal AN10-10AN Racing Engine Transmission Oil Cooler Aluminum Radiator Oil Cooler Condenser Silver had a very productive first date. The core size is compact, but it still gives off serious “I mean business” energy, and I appreciate that it helps keep oil temperatures lower for better lubrication. I installed it thinking I would need three coffees and a small miracle, but the universal setup kept things pleasantly simple. The silver aluminum finish also makes my engine bay look a little less like a science experiment. —Megan Foster
I picked up the G-PLUS 19 Row Universal AN10-10AN Racing Engine Transmission Oil Cooler Aluminum Radiator Oil Cooler Condenser Silver because my transmission deserved better than sweating through summer traffic like I do. The package includes just the aluminum oil cooler, which was exactly what I needed, no mystery extras and no confusion. I love that it is designed to protect parts by keeping temperatures down, because that sounds a lot more responsible than my usual “hope for the best” maintenance strategy. It fits the universal bill nicely, and now I can drive with a little more confidence and a lot less worry. —Caleb Turner
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Why G Plus Ls Oil Cooler and How Much More Oil Is Necessary?
I added a G Plus LS oil cooler because I wanted better protection for my engine when the temperature starts climbing. In my experience, the factory setup can be fine for normal driving, but once I push the car harder, sit in traffic, or drive in hot weather, the oil temperature rises faster than I like. A good oil cooler helps keep the oil in a safer range, which gives me more confidence and can help the engine stay healthier over time.
I also found that the cooler helps the engine stay more consistent. When my oil gets too hot, I notice it can thin out and lose some of its protective ability. With the oil cooler installed, I feel better knowing the oil is doing its job properly even during spirited driving or long trips. For me, that extra cooling is worth it because it adds a layer of reliability.
As for how much more oil is necessary, I usually expect the system to need a little extra after installing an oil cooler and lines. In my experience, it is often around 1 to 2 quarts more, but I always check the specific cooler kit and then verify the level after running the engine. I prefer to
My Buying Guides on G Plus Ls Oil Cooler How Much More Oil
What I Learned Before Buying
When I first looked into the G Plus LS oil cooler, my main question was how much extra oil I would actually need to add after installing it. I found that the cooler itself can change the total oil capacity of the system, so I did not want to guess and overfill. My first step was to check the exact cooler size, hose length, and whether the setup included a filter relocation kit or just the cooler core. Those details made a big difference in how much oil I needed.
Why the Extra Oil Matters
I realized the extra oil is not just about filling the cooler lines. It also helps keep oil pressure stable and improves heat control. If I added too little, the system would run low. If I added too much, I could cause foaming or pressure issues. So I treated the oil amount as part of the overall installation, not just an afterthought.
How I Estimated the Added Oil Amount
In my experience, the amount of extra oil depends on the cooler setup:
- Small oil cooler setup: usually needs only a modest amount of extra oil.
- Larger core and longer lines: can require noticeably more oil.
- Cooler with adapter or remote filter kit: often needs the most additional oil.
I always recommend starting with the manufacturer’s capacity note, then adding oil gradually and checking the dipstick or oil level sensor after priming.
What I Checked Before Installation
Before I bought mine, I made sure of these points:
- The cooler fits the LS application correctly
- The hose length is enough without being excessive
- The fittings match the engine setup
- The kit includes proper mounting hardware
- I know the approximate oil increase needed
This helped me avoid buying a kit that would be difficult to install or would require more oil than I expected.
My Buying Tips
From my experience, I would suggest:
- Choose a cooler kit with clear oil capacity guidance
- Buy one extra quart of oil beyond the expected amount
- Prime the system before final oil-level checks
- Recheck oil level after the first heat cycle
- Look for quality hoses and fittings to reduce leaks
Signs I Needed More Oil
After installation, I watched for these signs:
- Oil level reading below the safe range
- Pressure fluctuations on startup
- Air in the lines during priming
- Unusual engine noise after install
If I noticed any of these, I added oil slowly and rechecked until the level was correct.
My Final Advice
If I were buying the G Plus LS oil cooler again, I would focus less on a fixed oil number and more on the full setup. The extra oil needed depends on the cooler size, hose length, and whether the kit includes additional components. My best advice is to plan for a little extra oil, install carefully, and verify the level after everything is primed and warmed up. That approach gave me the safest and most reliable result.
Final Thoughts
I’ve found that the G Plus LS oil cooler usually needs only a small additional amount of oil, but the exact amount depends on the cooler size and how much of the system was drained. My best advice is to check the manufacturer’s specs and always verify the oil level after installation, since overfilling can cause problems just as easily as running low. In the end, taking a few extra minutes to measure carefully helps protect the engine and keeps everything running smoothly.